Circular looper



Aug. 7, 1928.

-F CIRCULAR noorn Filed m 15. 1925 3 slyeets-s'h eet l M ATTORNEY Aug. 71928.

. 1,679,428 7M. KOHLER CIRCULAR LOOPIJR I Filed May 15, 1925 3Sheets-Sheet 2 ,ob ATTORNEY a Ly Aug. 7, 192a. 1,679,428

M. KOHLER CIRCULAR LOOPER File May 15, 1925 3 Sheets-Sheet 3 fig-ATTORNEY Patented Aug. 7, 1928.

UNITED STATES MAX KbHLER, F LIMBAGH, GERMANY.

CIRCULAR LOOFER.

Application filed. May 15, 1925, Serial No. 30.405. and in Germany May18, 1924."

The present invention relates to an improvement in looping machines,more par- 7 ticularly to those of the type in which a ring of impalingpins is mounted on a rotatable dial, with means for looping or stitchingtogether the edges of a fabric or fabrics suspendedon said pins. WVellknown forms of looping machines include that illustrated in my previousPatent No. 1,026,808, dated May 21, 1912, in which the dial is rotatedintermittently, and another illustrated in patent to E. 0. Davis, No.1,050,432 dated January 14, 1913, in which the dial revolvescontinuously. My presentinvention is adapted more particularly to amachine in which the dial moves continuously and is-intended to overcomesome of the difficulties heretofore experienced in connection with theoperation ofknown devices of this type, althoughthe invention can inpart be effectively applied to loopers in which the movement of the dialis intermittent. In previously known looping machines, the thread needlesupporting mechanism has been adapted to be moved laterally during thatperiod of its reciprocatory movement in which the thread needle iseffectively engaging the loops of fabric to be connected. Oneresult ofthis combined motion has been, in some instances, to distort the loopsof fabric owing to the change in relative position between thelongitudinal axes of the thread needle and the particular impaling pinin connection with which the needle might be operating. This can bereadily understood, inasmuch as the impaling pinis moving through anarc, whereas the thread needle is simultaneously moving in a lateraldirection. One of the objects of my invention is to' provide in alooping machine thread needle supporting and actuating mechanismwhereby,in addition to its forward and backward movement, the thread needle issubjected to an arcuate deflection whereby its longitudinal axis re;mains parallel with the longitudinal axis of the impaling pin inconnection with which it opera One embodiment of my invention isillustrated in the drawings accompanying the present specification, andin which Figure 1 is a plan view of a portion of a looping machine,

Figure 2, a side elevation of the thread needle supporting and actuatingmechanism, 66 Figure 3, a detail partly in section,and

sliding rod 7 is also supported by the bracket 5 and carries at itsforward end a thread needle 8 to which reciprocatory motion is impartedfrom the rod 6 by means'of aconnecting rod 9, the forward and backmovement of said rod 6 being effected by means of a suitable connectionwith a main driving shaft 10 having an eccentric l1 cooperating with alink 12 which is pivotally secured to a lever 13. A link 14 connects thefree end of the lever 13 with the rod 6. The connection between the link14 and the lever 13 is preferably a ball joint, as indicated in Figure1, to permit the arcua-te d'efiection of the free end of the bracket 5.As indicated in Figure 1, the shaft 10 carries a pinion 15 meshing witha gear 16 mounted on a shaft 17 to which is secured an eccentric 18positioned to engageand deflect a lever 19 ivoted at 20. One end of anadjustable link 21 engages a slotted guide member 22 mounted on orforming a part of said lever 19, the opposite end of said link 21 beingpivotally secured to the bracket Sat 23. A coil spring 24 has one endsecured to a stationary portion of the machine, such as the dialsupporting arm 25, the other end being secured to the bracket 5 andadapted to retain the same normally in retracted position.

The dial may be rotated by any suitable actuating. means such forexample "as a shaft 26 and gears 27 and-28 cooperating with a rack 29secured to said dial. 1

It will be noted in connection with Figure '1 that the thread needle 8is normally posi-j tioned with its longitudinal axis parallel to aradius of the circle formed by the ring of impaling pins 4. The bracket5 is also mounted concentric with said ring of impaling pins and withits free end adapted to be deflected against resistance (if-spring 24 inan are around the common center.

In operation, the loops of fabric to .be' connected are positioned onthe impalingpins 4. The dial revolves either, continue ment with thelongitudinal axis of the needle 8 in its normal retracted position, theneedle is moved forward and into engagement with the loops suspended onsaid pin.

Simultaneously, the rotation of cam 18 im:

parts an arcuate movement of translation to the free end of bracket 5and thereby to the needle 8 so tliat'the needle travels through an arcof a circle simultaneously with the advancing movement of the pin withwhich it is in cooperative relation. The thread needle is then retractedand further rotation of the cam 18 permits the return of the bracket 5to normal beginning position.

From the foregoing description and the mode of operation set forth inconnection therewith, it will be apparent that the armate deflection ofthe needle in alignment with each impaling in permits the joining ofloops of fabric in a most efiective and expeditious manner. It will beunderstood, of course, that in forming loops the thread needle 8cooperates witha suitable looper hook, not shown, but which may be ofany well known construction, such for example as that shown in my patentpreviously referred to.

I claimas my invention:

1. In a looping machine, the combination of a rotatable dial having aplurality of radially disposed impaling pins, actuating radiallydisposed impaling pins, means for rotating said dial, a reciprocatingthread needle, a needle support, and means for deflecting said supportduring reciprocating movement of the thread needle whereby thelongitudinal axis of the thread needle is maintained constantly parallelwith a radius of the dial.

4;. In a. looping machine, the combination of a reciprocating threadneedle, a support therefor, a plurality of radially disposed impalingpins, means for moving said pins in succession past the path of thethread needle and means for elfecting arcuate deflection of said supportto maintain the longitudinal axis of the thread needle parallel with thelongitudinal axis of each impaling pin while the latter is in effectcooperative relation with respect to said thread needle.

In testimony whereof, I have signed my name to this specification thisfirst day of May, 1925.

MAX KOHLER.

